Refrigerating apparatus



Nov. 11, 1924. 1,514,968

' H. B. HULL REFRIGERAT ING APPARATU S Filed April so. 1923 ZZZ 272 55.25

" driven by another crank.

Patented Nov. 11, 1924.

UNITED STATES PATENT OFFICE.v

HARRY B. HULL, OF DAYTON, OHIO, ASSIGNOR TO DELCO-LIGHT COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

REFRIGERATING APPARATUS.

Application filed April 30, 1923. Serial No.'635,519.

To all "whom it may concern:

Be it known that I, HARRY B. HULL, a citizen of the United States of America, residing at Dayton, county of Montgomery,

State of Ohio, have invented certain new.

and useful Improvements in Refrigerating Apparatus, of which the following is a full, clear, and exact description.

This invention relates to mechanical motion or power transmission devices, and particularly to devices for transmitting motion from a driving member to a driven member While providing for hermetically sealing the driven member.

It is an aim of the invention to transmit motion to a hermetically sealed mechanism in a simple and eflicient manner and with the least wear to a part of the enclosure of the mechanism.

In certain aspects this invention provides;

gust 3, 1920. That application discloses a driving member including av crank shaft and a crank, and a pressure pump including a reciprocating member adapted to be The driving vcrank is connected with a reciprocating member by means of an intermediate crank shaft including a portion coaxial'with the driving crank shaft and provided at one end with a crank for engaging the reciprocating member. This intermediate crank shaft is bent intermediate its ends so as to provide aportion which is oblique to the axis of the driving crankshaft, and the end of this oblique portion is received by a bearing located in an eccentrically and obliquely disposed recess in the driving crank. The bend is of course such that the oblique portion of the intermediate crank shaft will be in true alignment with the said recess in the driving crank. The bent crank shaft is enclosed by a housing a portion of which is flexible and hermetically seals the crank shaft and a bearing which the pressure pump provides for it.-

- It is among the objects of the present invention to simplify the manufacture of apparatus of the type disclosed insaid copending application in order to facilitate the alignmentof the oblique portion of the intermediate crank shaft with the eccentrically and'obliquelydisposed recess in the driving crank. This aim of-the invention is preferably accomplished by making the oblique portion of the crank shaft and the coaxial portion in separate pieces, and by providing a simple driving connection be- .present invention is clearly shown.

In the drawings:

Fig. 1 is a side View partly in section of a pressure pump provided with the present invention Fig. 2 is a fragmentary top plan view ofdthe joint connecting the shaft portions; an

Fig. 3 is an end view of the obliquely disposed shaft portion as shown in F ig. 1.

The pressure pump includes a frame 20 providing an eccentric crank housing and a gear housing 22 separated by a wall 23. Gear housing 22 is enclosed by an end Wall 24 provided with an opening 25 large enough to provide for removal of parts of the pump driving mechanism. The opening 25 is closed by a cover member 26 attached by screws 27, the joint between members 24 and 26 being sealed by packing 28.

The end member 26 is provided with a hollow cylindrical extension 30 providing bearings 31 and 32 for a hollow crank shaft 33 having an eccentrically and obliquely disposed hole 34 adapted to receive a hollow cylindrical bearing 35 the diameter of which is increased at 36: to provide'for receiving a portion of the motion transmitting intermediate crank. shaft to be described. Driving crank shaft 33 includes an outwardly flaring flange 37 provided with. gear teeth 38 adapted to mesh with a worm gear 39 rotatably supported by the frame 20 and driven by any suitable power means such as an electric motor.

The frame 20 supports a cylinder block 40 providing cylinders 41 and 42. Theblock is attached by screws such as 43, and the joint between the block and the frame is sealed by packing 44. A piston such as 45 reciprocates in each cylinder and the two pistons are connected by connecting rods including eccentric straps 46 and 47 which cooperate the partition wall 23. Bearing .54 serves as j a cover for an opening 55 providing for removalof the crank shaft portion 52. The "bearing member 54 is secured in position by screws 56 and the joint between the partition wall 53 and bearing 54 is sealed by packing 57.

The obliquely disposed crank shaft por- .tion designated by numeral 60 and includes a reduced end 61 serving as a journal which I is received within athimble-like bushing or bearing The joint betweenvthe crank shaft portions 52 and 60' is provided by notching the end of shaft portion 60 to provide. tongues 62,63, 64, and 65 located 90 apart. The end faces of these't'ongues are all perpendicular to the shaft portion 60.

Tongues 62 and 64 are received by notches 66 and 68 respectivelyprovided in one end of the shaft portion 52, notches 66 and 68 "are diametrically opposed and the end or hottom surfaces defining-these notchesarelin alignment and are oblique, to the axis .of shaft 52 by an amount, whichflis equal to the acute angle'between shaft portion'sf 52f and 60. The tongues 63 and65 are1receivedby notches 67 and 69 "respectivelyf provided in shaft 52. Notches 67 and69arediametri- .cally opposed and arranged oblique to the axis of shaft 52 by an amount equal to the. angularity of shaft'60. The. tongues are slightly loosely received by the notches, there being suflicient clearance to permit the shaft 52 to be located by its bearings and the shaft 60 by its bearing 35 without interference by the tongue-and-groove joint.

a In order to seal the motion transmitting shaft portions entirely and the bearings for supporting said shaft portions there is provided a flexible sleeve 70 commonly known as a sylphon. The sleeve 70 is attached at one end to thebearing 35 and at the other to a washer 71 which is clamped against a bearing member 54 by means of a clamping ring 72 and the screws 56. The joint between the Washer 71 and the bearing 54 is sealed by packing 73.

It is therefore apparent that the crank case chamber 21 and the motion transmission shaft'portions 60 and 52 are hermeti cally sealed to prevent the escape of compressed gas from the crank case of the coin pressor. The crank shaft 5260 is enclosed by a housing which includes a flexible portion which permits one portion of the crank shaft to revolve about the axis of the other portion. This flexible portion of the housing is the flexible sleeve 7 O which is permanently attached by brazing or soldering to the' bearing 36 and to the washer 71.

The air pump is particularly adapted for refrigerating apparatus and is of the type in which the gas to be compressed enters at 80, passes through the pistons and is discharged through an outlet 81.

Aygpower transmitting mechanism is so constructed that it may be readily disassembled. After removing the screws 27 the housing end-cover or driving crank shaft bearing member may be removed from the frame 20'. 'Then the crank shaft 33 may be moved by an outward and oblique movement so that the bearing 35 will be withdrawn from.the recess 34. By-removing screws 56 the crank shaft 5260 with its bearing 54 and flexible housing can be removed in as sembled-relation, the eccentrics 48 and 49 remaining in position and supported by the eccentric straps 46 and '47, respectively. Afterremoving the screws 43, the cylinder a block, pistons, stra s and eccentrics can be removed from the frame 20. The frame 20 is provided with a removable plug 82 adjacent the bearing 53. By removing this plug access is provided to the right hand end of shaft '52 so that it may be tapped by a hammer to assist in loosening the bearing 54.

Lubrication is provided by placing a quantity of oil in each chamber 21 and 22 as indicated by level lines and 91'. The eccentric'straps will be lubricated by splashing into the oil under level 90 and throw oil upon the bearing- 54 and on the shaft 52.

Some oil will find its way to bearing 53, and

to bearing surface of 54 through hole 92.

Oil in chamber 22 will be splashed by gear 38 and some of it will enter hole-193 and lubricate the surfaces of bearing d 32. The bearings35 will be lubri'e v oil entering at 94 or through side hol 95 and 1; In a mechanicahmove n nt device, the

combination with a drivingshaft and crank carried thereby; having'farr eccentrically and obliquely disposed 'tlriving portion; of a driven mechanism; meansfor connecting the driving shaft and driven mechanismiin eluding separate. obliquely disposed shaft ortions, one aligned with thei -axis of theriving shaft and the other with the axis of said driving portion, and provisions for connecting said shaft portions permitting running along the bearing .35 the re the adjustment of the shaft portions in said positions of alignment; and a housing for said shafts including a flexible member permitting one shaft portion to revolve about the axis of'the other portion.

2. In a mechanical movement device, the

combination with a driving shaft and crank carried thereby having an eccentricallyand obliquely disposedrecess; of a driven mechanism; means for connecting the driving shaft and driven mechanism including separate obliquely disposed shaft portions, one aligned with the axis of the driving shaft and the other. with the axis of said driving recess, and provisions for connecting said 'sliaftportions permitting the adjustment of the shaft portions in said positions of alignment; and a housing for said shafts including a flexible member permitting one shaft portion to revolve about the axis of the other portion.' v

3. In a mechanical movement device, the combination with a driving shaft and crank carried thereby having an eccentrically and 'obliquely disposed driving portion; of a driven mechanism; means for connecting the driving shaft and driven mechanism ineluding separate obliquely-disposed shaft portions, one aligned with the axis of the driving shaft and the-other with the axis of said driving portion, and a tongue-andgroovejoint between the portionstof such looseness as to permit the adjustment-of the shaft portions in said positions .of alignment; and a housing for saidshafts including a flexible member permitting one shaft ,carried thereby having an eccentrically andportion to revolve about the axis of the other portion.

' 4. In a mechanlcal movement device, the combination .with itdllVlIlg shaft and crank obliquely disposed driving recess; of a driven signature.

mechanism; means for connecting the driven mechaism and driving shaft including a shaft portion in alignment with the driving shaftand a portion received by said driving recess; means for hermetically seal-i ing said mechanism and connecting shaft portions; means for lubricating said connecting shaft; and separate means for lubricating the driving crank shaft and driving recess." I

5. Ina mechanical movement device, the

combination with a driving shaft and crankcarriedthereby having an eccentrically and obliquely disposed driving recess; of .a

driven, mechanism; means for connecting the driven mechanism and driving shaft including a shaft portion in alignment withthedriving shaft and a portion received by said driving recess; means for hermetically sealing said mechan1sm and connecting shaft portions; including a flexible part;

means providing -a bearing for the driving crank shaft and the flexible part. I

In testimony whereof I hereto aflix my Witnesses:

MILDRED PEARE, WARREN SCHMIEDING.

I HARRY- 13. HULL 

